A series of murders in Vienna is connected to state secrets being leaked from the heart of the Austro-Hungarian Empire. Max and Oskar risk everything to discover the traitor's identity.

Cast: Matthew Beard, Juergen Maurer, Luise von Finckh, Charlene McKenna, Amelia Bullmore, Conleth Hill, Raphael von Bargen, Josef Ellers, Simon Hatzl, Miriam Hie, Robert Reinagl, Leonie Benesch, Ulrike Beimpold, Maria Köstlinger, Johannes Zeiler, Johannes Zirner, Stipe Erceg, Murathan Muslu